Whose reasoning is correct?
Some people say something must be true. Test them by trying to build a case where the facts are true but they’re wrong.
BY THE END
You’ll be able to tell a ‘must’ from a ‘might’, and prove a claim wrong with a counter-example.
Can you prove Mia wrong?
Move Pip around. Keep both facts true. If Mia’s claim turns false, you’ve built a counter-example.
THE FACTS
- ✓Every dog in the show wears a ribbon.
- ✓Pip wears a ribbon.
WHAT THEY SAY
- Mia: ‘So Pip must be in the show.’Still true here
- Tom: ‘Pip might not be in the show.’Not shown yet
Tap a name, then tap a place. Or drag it.
YOUR ANSWER
If the facts are true, whose reasoning is correct?
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